Touching (non-sexual)

I'm wondering if you could all help me with something.

Since September, I've found that I really can't stand having people touch me, even if it's on my arm or whatever. Even with my friends I hate it unless I initiate it (for example a hug).

Recently it's gotten worse and I now find myself even hating the idea of being touched. If one of my friends even moves to touch me but isn't making contact, I flinch a try to move away.

I've just got home from rugby training, and it's gotten so bad now that I absolutely couldn't stand being tackled, but I was ok when I was the one doing the tackling.

I was just wondering if anyone had any idea what might be wrong with me, or if anyone had any tips on how to like, overcome it or whatever.

Oh, and I've never been sexualty assulted or harassed, if that helps.

Thanks for taking your time to read :)